SEPARA - Syringeless filter vial. SEPARA 32mm Syringeless Filter Vial, 0.20 µm, Light Green Cap, PES, 100-pk. MSRP: Now: $170.00. Was: PES (Polyethersulfone): Hydrophilic, designed to remove particulates, low protein and drug binding, and high strength and durability. Use for filtration of buffers and culture media.